[firedrake] Firedrake on supercomputers

[Lawrence Mitchell]

Dear Tuomas,

a somewhat late reply.

On 11/08/14 22:49, Tuomas Karna wrote:

...

> Load balancing may be an issue on this grid, haven't looked at that yet.
> I'm also seeing performance degradation over time in parallel, so I
> suspect there's a bug somewhere but haven't dug deep enough to find it.

Eventually, we found this bug, there was a problem in the way we were
preallocating matrices in parallel when running non-linear problems that
had zero initial conditions, resulting in performance degradation when
assembling Jacobians.  If you get a chance to run with current firedrake
[352295c] and PyOP2 [adb4114] master branches, you should hopefully see
that this has gone away.

Cheers,

Lawrence